Improved mode of disintegrating vegetable substances for paper-pulp



UNITED STATES PATENT. OFFICE.

'ZEPHTRIN GASPARD ALEXANDRE NATHAN PETBONE ORIOLT, 'AMABLE ALFREDFREDET, AN D PIER-RE AMABLE .lTENR-l MATUSSTERE, OF

PARIS, FRANCE.

IMPROVED MODE 0F DISINTEGRATING VEGETABLLE SUBSTANCES FOR PAPER-PULP.

Specification forming part ol Letters Patent No. 47,505, dated April 25,1865. I

- To all whom it may concern:

Be it known that we, Z. G. A. N. I. ORIOLI, A.. A. FREDET, and P. A. H:llIAIUSSfERE, all of Paris, in the Empire of France, have invented a newand Improved Process for Disintegrating Fibrous Materials; and we dohereby declare that the following is a full, clear, and exactdescription thereof, which will enable those skilled in the artto'fu'lly understand and use the same. I v

This invention is based on the discovery that aqua-regia, when appliedin the proper proportion, destroys all ligneous matters withoutattacking the fiber or cellulose.

The aqua-regia which we use in carrying out our invention is composed ofnitric and hydrochloric acid mixed together in about the followingproportions: nitric acid, from five to forty per cent; hydrochloricacid, from ninety-fivd'. to sixty per cent. nitric acid in its raw statebefore it is bleached, and just as it is drawn from the reservoirs ortanks in which itis manufactured, and the hydrochloric acid weemploy inthe state in which it usually comes in the market. The variation in theproportion of the two acids composing the aqua-regia is renderednecessary by the variable nature of the incrustating elements whichattend the vegetable fibers, an d also of the variable strength of theacids. It

istherefore necessary to-determine in' each particular case,by apreliminary test, the exact propoition in which the acids have to bemixed. a

Our process is particularly applicable for the purpose of disintegratingwood of different kind, or for straw and other vegetable We employsubstance, for the purpose of preparing paperpulp, and we proceed in thefollowing manner: Ai'te1' the strength of theacid has been oncedetermined for a particular kind of substance the wood is reduced intochips, the straw or other material of small diameter into fragments, andallowed to dry, so as to avoid an excess of water, which would weakenthe aqua-regia. These chips or other fragments are digestedin the acidbath till they have absorbed their weight of the liquid, and theremaining acid ispoured oil and saved fora subsequent operation. Afterthe vegetable substance has been removed from the acidit .is washed inclean water and the fibers are claim asnew and desire to secure byLettels Patent- The within-described process .for disintegratingvegetable materials by the application of aquaregia, substantially inthe mannerherein setforth.

Z. ORIOLI. A. FREDET. P. MATUSSIERE. Witnesses;

E. SHERMAN GOULD, C. Grnos.

